IGCSE Computer Science (0478) — May–June 2023, Paper 23

Tick (✓) one box to complete the sentence. A constant [ ] A stores a value that can change at any time during the execution of a program. [ ] B stores a value that cannot change…

Explain the purpose of the library routines MOD and RANDOM MOD ........ RANDOM ........

Describe what happens when a function is called during the execution of a program.

Explain why verification checks are used when data is input.

Four descriptions of validation checks are shown. Draw one line to link each description to the most appropriate check. Not all checks will be used. Descriptions: - to check that…

An algorithm has been written in pseudocode to allow 100 positive numbers to be input. The total and the average of the numbers are output. 01 Counter ← 100 02 Total ← 0 03 WHILE…

The flowchart represents an algorithm. An input of –1 will terminate the algorithm. Flowchart logic: Total ← 0; loop: INPUT Value; IS Value = -1? If Yes, OUTPUT Total then STOP.…

Consider the logic expression: Z is 1 if (A = 1 AND C = NOT 1) AND (B = 1 NOR C = 1) Draw a logic circuit for this logic expression. Each logic gate must have a maximum of two…

The variable Saying is used to store string data in a program. Write the pseudocode statement to declare the variable Saying.

A database table called Site1 stores details of some holiday homes at a holiday park, showing the type of home, number of guests, whether it is privately owned and the weekly rate…

A two-dimensional (2D) array Contacts[] is used to store names and telephone numbers. All the data is stored as strings. The array must have the capacity to store 100 contacts:…